• State TI Thinks Resolved
  • Locked Locked
  • Replies 7 replies
  • Answers 1 answer
  • Subscribers 46 subscribers
  • Views 399 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

DAC5571: How to discrete 0-10v analog outout?

Shu-Cheng LIN
Guru 11785 points
Part Number: DAC5571
Other Parts Discussed in Thread: DAC7760, TL071

Hi Sirs,

Sorry to bother you.

We are survey DAC parts, spec as below

Looks DAC5571 could meet I2C and 8 bit resolution, but not meet 0-10v analog.

So is there any possible to use discrete do this function?

Or have other solution can meet our spec?

Our inquire as below

  • 0
    TI__Mastermind 46290 points

    Hello Shu-Cheng,

    A low-resolution, high-voltage output is fairly uncommon so the discrete route is most likely going to be your most cost-effective option given the requirements you have shared so far. In order to see built-in 0-10V output for the DAC, we would need to think about 12-bits or greater.

    So, your best option is probably just a DAC followed by a non-inverting amplifier stage to hit your 0-10V target. If you'd like to share any further details concerning the goals of your solution I can help suggest DAC and amplifier products to realize your solution.

  • 0 in reply to Kevin Duke
    Guru 11785 points

    Hi Sirs,

    Thanks for your reply,

    So, if 8 bit didn't have suitable solution, have 12 bit part number can share?

    If our best choose is use DAC followed by a non-inverting amplifier stage to hit 0-10V target, did you have any part number or reference schematic can share?

  • 0 in reply to Shu-Cheng LIN
    TI__Mastermind 46290 points

    Shu-Cheng,

    Most likely the best option for you is the discrete path due to the resolution requirements you have right now which normally also come with a focus on low-cost. The circuit is very straight-forward, what I would need to make part suggestions are more details on items like accuracy at room temperature, operating temperature range, accuracy over the operating temperature range, load drive capabilities, etc. There are many TI DACs and amplifiers, especially, which could be applied in this case given the requirements I know so far.

    What are the timelines for this project? When would prototypes be built and when would the system go to mass production?

    The nearest option for 12-bit resolution and high-voltage output which exists in the portfolio today is the DAC7760.

  • 0 in reply to Kevin Duke
    Guru 11785 points

    Hi Sirs,

    Thanks for your reply.

    Actually we need I2C control but DAC7760 is SPI.

    So does TI have other solution can share?

  • 0 in reply to Shu-Cheng LIN
    TI__Mastermind 46290 points

    Hello,

    There is no other fully-integrated single-channel 12-bit high-voltage option available at this time. I would refer back to the questions I asked in my previous post to find our way forward.

  • 0 in reply to Kevin Duke
    Guru 11785 points

    Hi Sirs,

    Thanks for your reply.

    Actually we have cost concern so we'll choose discrete to this function.

    So, if we don't have any special spec concern on AMP, could we use DAC5571 +TL071 to meet this function?

  • 0 in reply to Shu-Cheng LIN
    TI__Mastermind 46290 points

    Shu-Cheng,

    Based on the limited set of requirements we have discussed right now, that combination of devices should be acceptable.